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Swap two Strings without using temp variable in C#
To swap two strings without using a temp variable, you can try the following code and logic.
Append the second string with the first.
str1 = str1 + str2;
Set the str1 in str2.
str2 = str1.Substring(0, str1.Length - str2.Length);
Now, the final step is to set str2 in str1 −
str1 = str1.Substring(str2.Length);
Example
using System;
class Demo {
public static void Main(String[] args) {
String str1 = "Brad";
String str2 = "Pitt";
Console.WriteLine("Strings before swap");
Console.WriteLine(str1);
Console.WriteLine(str2);
str1 = str1 + str2;
str2 = str1.Substring(0, str1.Length - str2.Length);
str1 = str1.Substring(str2.Length);
Console.WriteLine("Strings after swap");
Console.WriteLine(str1);
Console.WriteLine(str2);
}
}
Updated on: 21-Jun-2020
1K+ Views
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